<!DOCTYPE html>
<html>
    <head>
        <link rel=match href=img_block_maxwidth_ref.html>
        <style type="text/css">
            body {
                margin: 0;
            }
            img {
                max-height: 200px;
            }
        </style>
    </head>
    <body>
        <img src="400x400_green.png">
    </body>
</html>
